| Author Information | |
| Title / Name: | Sayuti Hasibuan |
| Address : | Kampus UAI Lantai 4, Kompleks Mesjid Agung Al Azhar Jl.Sisingamangaraja, Kebayoran Baru, Jakarta 12110 Phone: 62-21-7244456, Ext. 4006 Fax: 62-21-7244767 Email: Sayuti@uai.ac.id HP: 085780989145 |
| Country: | Indonesia |